package twomassive2;

class TwoMassive2 {
    public static void main(String args[]) {
	int twoD[][] = new int[4][];
            twoD[0] = new int[1];
            twoD[1] = new int[2];
            twoD[2] = new int[3];
            twoD[3] = new int[4];
	int i, j, k = 0;
		
	for(i = 0; i < 4; i++) {
            for(j = 0; j < i + 1; j++) {
		twoD[i][j] = k;
		k++;
            }
	}
		
	for(i = 0; i < 4; i++) {
            for(j = 0; j < i + 1; j++)
		System.out.print(twoD[i][j] + " ");
            System.out.println("");
	}
    }
}